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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 465 · 40 questions
TalentJR

The fast method (Shift both): How much makes the second number round? 68 needs 2 to make 70. Add that amount to BOTH numbers. Take away the round number.

NameDateTime takenScore ___ / 40
  1. 1.158 − 29 =
  2. 2.531 − 17 =
  3. 3.589 − 16 =
  4. 4.274 − 59 =
  5. 5.461 − 18 =
  6. 6.374 − 16 =
  7. 7.317 − 39 =
  8. 8.480 − 37 =
  9. 9.207 − 26 =
  10. 10.560 − 89 =
  11. 11.332 − 37 =
  12. 12.275 − 37 =
  13. 13.553 − 88 =
  14. 14.411 − 49 =
  15. 15.505 − 16 =
  16. 16.380 − 16 =
  17. 17.548 − 38 =
  18. 18.77 − 17 =
  19. 19.529 − 16 =
  20. 20.509 − 96 =
  21. 21.63 − 26 =
  22. 22.452 − 38 =
  23. 23.308 − 79 =
  24. 24.171 − 68 =
  25. 25.269 − 36 =
  26. 26.92 − 29 =
  27. 27.421 − 36 =
  28. 28.99 − 36 =
  29. 29.548 − 78 =
  30. 30.373 − 68 =
  31. 31.227 − 68 =
  32. 32.392 − 96 =
  33. 33.343 − 86 =
  34. 34.285 − 29 =
  35. 35.108 − 16 =
  36. 36.180 − 68 =
  37. 37.158 − 77 =
  38. 38.265 − 27 =
  39. 39.247 − 28 =
  40. 40.585 − 56 =

Answer key

  1. 129
  2. 514
  3. 573
  4. 215
  5. 443
  6. 358
  7. 278
  8. 443
  9. 181
  10. 471
  11. 295
  12. 238
  13. 465
  14. 362
  15. 489
  16. 364
  17. 510
  18. 60
  19. 513
  20. 413
  21. 37
  22. 414
  23. 229
  24. 103
  25. 233
  26. 63
  27. 385
  28. 63
  29. 470
  30. 305
  31. 159
  32. 296
  33. 257
  34. 256
  35. 92
  36. 112
  37. 81
  38. 238
  39. 219
  40. 529

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